using System.Collections;
using System.Collections.Generic;
using Ichni.RhythmGame.Beatmap;
using UnityEngine;

namespace Ichni.RhythmGame
{
    /// <summary>
    /// 包含效果的次级模块
    /// </summary>
    public partial class EffectSubmodule : SubmoduleBase
    {
        public Dictionary<string, List<EffectBase>> effectCollection;
        
        public EffectSubmodule(GameElement attachedGameElement, EffectSubmodulePreset preset = EffectSubmodulePreset.Default) 
            : base(attachedGameElement)
        {
            effectCollection = new Dictionary<string, List<EffectBase>>();

            if (preset == EffectSubmodulePreset.Default) //对于默认的效果次级模块，只有Default效果集合
            {
                effectCollection.Add("Default", new List<EffectBase>());
            }
            else if (preset == EffectSubmodulePreset.Note) //对于Note的效果次级模块，在Note的不同状态下有独立的效果集合
            {
                effectCollection.Add("Generate", new List<EffectBase>());
                effectCollection.Add("GeneralJudge", new List<EffectBase>());
                effectCollection.Add("Holding", new List<EffectBase>()); //仅用于Hold
                effectCollection.Add("Perfect", new List<EffectBase>());
                effectCollection.Add("Good", new List<EffectBase>());
                effectCollection.Add("Bad", new List<EffectBase>());
                effectCollection.Add("Miss", new List<EffectBase>());
            }
        }
        
        public EffectSubmodule(GameElement attachedGameElement, Dictionary<string, List<EffectBase_BM>> effectList_BM) : base(attachedGameElement)
        {
            effectCollection = new Dictionary<string, List<EffectBase>>();
            
            foreach (var effect in effectList_BM)
            {
                List<EffectBase> effectList = new List<EffectBase>();
                foreach (var effectBM in effect.Value)
                {
                    effectList.Add(effectBM.ConvertToGameType());
                }
                effectCollection.Add(effect.Key, effectList);
            }
        }
        
        public override void SaveBM()
        {
            matchedBM = new EffectSubmodule_BM(attachedGameElement);
        }
    }

    public partial class EffectSubmodule
    {
        public enum EffectSubmodulePreset
        {
            Default,
            Note,
        }
    }
    
    public interface IHaveEffectSubmodule
    {
        public EffectSubmodule effectSubmodule { get; set; }
    }

    namespace Beatmap
    {
        public class EffectSubmodule_BM : Submodule_BM
        {
            public Dictionary<string, List<EffectBase_BM>> effectCollection;
            
            public EffectSubmodule_BM()
            {
                
            }

            public EffectSubmodule_BM(GameElement attachedElement) : base(attachedElement)
            {
                effectCollection = new Dictionary<string, List<EffectBase_BM>>();
                IHaveEffectSubmodule element = attachedElement as IHaveEffectSubmodule;
                
                foreach (var effect in element.effectSubmodule.effectCollection)
                {
                    List<EffectBase_BM> effectList = new List<EffectBase_BM>();
                    foreach (var effectBase in effect.Value)
                    {
                        effectList.Add(effectBase.ConvertToBM());
                    }
                    effectCollection.Add(effect.Key, effectList);
                }
            }

            public override void ExecuteBM()
            {
                attachedElement = GameElement_BM.GetElement(attachedElementGuid);
                (attachedElement as IHaveEffectSubmodule).effectSubmodule = new EffectSubmodule(attachedElement, effectCollection);
                attachedElement.submoduleList.Add((attachedElement as IHaveEffectSubmodule).effectSubmodule);
            }
            
            public override void DuplicateBM(GameElement attached)
            {
                (attached as IHaveEffectSubmodule).effectSubmodule = new EffectSubmodule(attached, effectCollection);
                attached.submoduleList.Add((attached as IHaveEffectSubmodule).effectSubmodule);
            }
        }
    }

    public abstract class EffectBase
    {
        public enum EffectState
        {
            Before = -1,
            Middle = 0,
            After = 1,
            Error = 100
        }
        
        /// <summary>
        /// 效果的持续时间，如果为0则表示瞬间效果
        /// </summary>
        public float effectTime;
        
        /// <summary>
        /// 是否是瞬间效果
        /// </summary>
        public bool isInstantEffect => effectTime <= 0;
        
        /// <summary>
        /// 效果当前的状态
        /// </summary>
        public EffectState nowEffectState;

        protected EffectBase()
        {
            this.effectTime = 0;
            this.nowEffectState = EffectState.Before;
        }

        protected EffectBase(float effectTime)
        {
            this.effectTime = effectTime;
            this.nowEffectState = EffectState.Before;
        }

        public virtual void UpdateEffect()
        {
            EffectState state = CheckEffectState();
            
            if (state == EffectState.Before && nowEffectState != EffectState.Before)
            {
                nowEffectState = EffectState.Before;
                Recover();
            }
            else if (state == EffectState.Middle)
            {
                nowEffectState = EffectState.Middle;
                Execute();
            }
            else if (state == EffectState.After && nowEffectState != EffectState.After)
            {
                nowEffectState = EffectState.After;
                Adjust();
            }
        }

        public virtual EffectState CheckEffectState()
        {
            throw new System.NotImplementedException();
        }
        
        /// <summary>
        /// 在效果的持续时间内，触发这个方法
        /// </summary>
        public virtual void Execute()
        {
            
        }

        /// <summary>
        /// 如果是非瞬间效果，在效果完成后，触发这个方法；
        /// 如果是瞬间效果，则此方法即为Execute。原有的Execute方法不被调用。
        /// </summary>
        public virtual void Adjust()
        {
            
        }

        /// <summary>
        /// 如果时间轴回退到效果的触发时间之前，则触发这个方法
        /// </summary>
        public virtual void Recover()
        {
            
        }

        /// <summary>
        /// 转换为存档类
        /// </summary>
        /// <returns></returns>
        public abstract EffectBase_BM ConvertToBM();
    }

    namespace Beatmap
    {
        public abstract class EffectBase_BM
        {
            public float effectTime;
            
            public EffectBase_BM()
            {
                
            }
            
            public EffectBase_BM(float effectTime)
            {
                this.effectTime = effectTime;
            }
 
            /// <summary>
            /// 转换为游戏类
            /// </summary>
            /// <returns></returns>
            public abstract EffectBase ConvertToGameType();
        }
    }
}